不同合成條件製備雙酚A型環氧樹脂之性質

Properties of Bisphenol A Type Epoxy Resins Prepared Under Different Synthesis Conditions

林俊延(Jeun-Yan Lam) ； 李文昭(Wen-Jau Lee)

《林產工業》 33卷3期 (2014/09) Pp. 161-170

https://doi.org/10.6561/FPI.2014.33(3).5

摘要

本研究以環氧氯丙烷及雙酚A 為原料合成環氧樹脂，探討反應物莫耳數比（5/1、4/1、3/1）及反應時間（1 h、2 h、3 h）對所製備環氧樹脂性質之影響，並以三乙基四胺為架橋硬化劑，分析不同合成條件硬化環氧樹脂之性質。由試驗結果得知，合成反應時間對所得環氧樹脂之黏度、環氧當量、平均分子量、DSC 熱硬化性及硬化樹脂溶出試驗重量保留率、抗彎強度及熱抵抗性無明顯影響。然環氧樹脂之性質受合成時採用環氧氯丙烷/雙酚A 之莫耳數比所影響，隨莫耳數比降低，合成樹脂之黏度、環氧當量、平均分子量提高，硬化反應之放熱峰向高溫側偏移，反應熱降低，硬化樹脂溶出試驗重量保留率、抗彎強度、儲存模數、相轉移溫度降低，然硬化樹脂之熱抵抗性提高。

關鍵字

雙酚A ； 硬化樹脂 ； 環氧氯丙烷 ； 環氧樹脂 ； 莫耳比

並列摘要

In this study, epoxy resins were synthesized by using epichlorohydrin and bisphenol A as raw materials. The influences of the molar ratio of reactant (5/1, 4/1, 3/1) and reaction time (1 h, 2 h, 3 h) on the properties of epoxy resins were investigated. Triethylenetetramine was used as a crosslinking hardener, and the performance of cured resins prepared under different synthesis conditions were evaluated. The results show that the viscosity, epoxy equivalent weight (EEW), average molecular weight and DSC heat-curing behavior of epoxy resins, as well as the weight retention after dissolution test, the bending strength and the heat-resistance of cured resins did not be influenced by the reaction time. However, the properties of epoxy resins were influenced by the molar ratios of epichlorohydrin/bisphenol A that used for synthesizing. The viscosity, EEW and average molecular weight of epoxy resins increased with decreasing the molar ratio. The exothermic peak due to curing reaction shifted to higher temperature with less reaction heat. In addition, the weight retention, bending strength, storage modulus and phase transition temperature of cured resins decreased with decreasing the molar ratio. However, the heat resistance of cured resins increased.

並列關鍵字

Bisphenol A ； Cured resins ； Epichlorohydrin ； Epoxy resins ； Molar ratios